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Note 16 - Stock-Based Compensation - Stock Option Plans (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Stock-Based Compensation
Outstanding, shares (in shares)	290,149	346,678	367,998
Outstanding, Weighted average exercise price (in dollars per share)	$ 32.11	$ 27.6	$ 24.46
Granted, shares (in shares)	29,900	25,000	22,400
Granted, Weighted average exercise price (in dollars per share)	$ 56.79	$ 53.31	$ 53.87
Exercised, shares (in shares)	(95,724)	(81,354)	(41,695)
Exercised, Weighted average exercise price (in dollars per share)	$ 22.05	$ 19.45	$ 14.07
Forfeited, shares (in shares)	(3,479)	(175)	(2,025)
Forfeited, Weighted average exercise price (in dollars per share)	$ 39.01	$ 15.65	$ 26.72
Outstanding, shares (in shares)	220,846	290,149	346,678
Outstanding, Weighted average exercise price (in dollars per share)	$ 39.7	$ 32.11	$ 27.6
Exercisable, shares (in shares)	158,911	233,967	295,077
Weighted average fair value per option granted (in dollars per share)	$ 18.61	$ 16.36	$ 13.97

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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